Saw-setting machine.



No. 66l,647. v Patented Nov l3, I900.

A. C. SAXTUN.

SAW SETTlNG MACHINE.

(Application filed Nov. 2, 1899.)

(No Model.) 3 Sheets-Sheet l. v

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No. 66l,647.

Patented Nov. I3, I900. A. C. SAXTON.-

SAW SETTING MACHINE.

' (Application filed Nov. 2, 1899.)

3 Sheets-Shaet "'2.

(No Model.)

a N WW i 6 Patented Nov. l3, I900.

No. 661,647. I

Y A. C. SAXTON.

SAW SETTING MACHINE.

I (Applicatioq flied Nov. 2, 1899.) 010mm.) a Sheets-Sheet a.

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NITED' STATES PATENT OFFICE.

AUGUSTUS C. SAXTON, OF NEW YORK, N. Y.

SAW-SETTING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 661,647, dated November13, 1900.

Application filed November 2, 1899. Serial No. 735,579. (No model.)

To all. whom, it may concern:

Be it known that I, AUGUSTUS O. SAXTON,

a citizen of the United States,and a resident of No. 371 Pearl street,in the borough of Brooklyn, city of New York, county of'Kings, and Stateof New York, have invented a new and Improved Saw-Settinglvlachine, ofwhich the following is a specification.

The general features of my invention are as follows: The saw-blade,having teeth out on it, is clamped in a device which I call a travelingcarriage, the toothed edge of the blade projecting above the carriage. Afeeding apparatus, automatically actuated by the machine, feeds thecarriage and the saw carried by it to the machine by a'step-by-stepmovement, two teeth at a time. In its transit the teeth of the saw comeopposite certain fixed anvils, opposite to which anvils areautomatically-actuated plungers which are struck by spring-actuatedhammers, one of them adapted to act upon the teeth to be set to theleft,

the other upon the teeth to be set to the right, and the machine is sotimed that the feeding of the saw-blade and the setting of the teethfollow in exceedingly-rapid succession,so that it takes a very brieftime only to set a saw.

Referring to the drawings thereof, Figure 1 illustrates a plan view ofthe machine. Fig. 2 illustrates an elevation, partly in section, takenon the line 1 1 of Fig. 1. Fig. 3 is an end view taken at the front ofthe machine. Fig. 4 illustrates a detail of one of the anvils and itsplunger. Fig. 5. illustrates a detail in section of one of the rackswhich actuate the hammers.

A is the main shaft of the machine, upon which are mounted fast andloose pulleys B B, as usual.

C is the driving-belt.

D D are casings, having hubs E E, which are set upon the shaft A. a

F F are cams connected with rods G, which by wrist-pins H H areconnected to verticallysliding racks I 'I. These racks engage withpinions J, loosely set upon shafts K.

L L are arms connected, respectively, to the pinions J, which turn withthem loosely upon the shafts K. v

M M are pawls pivoted to the arms L, each actuated by a spring N, andeach has near its extremity a pin 0.

P P are the hammers, made somewhat in the form of segments, eachprovided with a notch or detent Q. The hammers are fast upon the shaftsK.

R R are two cam-like tripping devices for the pawls M M, respectively,the pins 0 upon which engage with the inclined surfaces S S thereof, ashereinafter explained. The tripping devices R R are rigidly attached tosome part of the machine.

T T are two cases, within each of which is a somewhat strong coiledspring U, one end of which. engages with the shaft K, as shown, and theother end with the casing T.

V V are the plungers. suitable openings made in studs W W on the machineand are actuated, respectively, by springs Y Y. These springs at one endZ abut against one of the studs W WV and are free at their other ends,which engage, respectively,with an enlarged head on the plungers V, sothat when the plungers are forced inwardly by the blow of the hammers P,compressing the spring, and the pressure is relieved the spring willautomatically return them to their primary location.

a a (see Fig. 1) are the two anvils. They are held in place by aclamping-plate Z) Z) and set-nut c c, and are so arranged as to bepresented directly opposite the ends of the plungers. In Fig. 4 I show adetail of the arrangement of the anvils and plungers. The anvils a areground true on the face, but the top and bottom edges are ground on abevel, as shown at d (Z, and the face of the plungerV is ground to suchan angle as to accurately engage with the beveled edges (1 d of theanvils to produce the desired set and upsetting or flattening of theteeth.

The saw and its carriage are best shown in Fig.-2.

c is the saw-blade, and f the carriage, provided with feeding-teeth g onits upper edge.

h hare set-screws upon which the saw-blade is supported and adjusted inthe carriage. They are threaded into the two parts of the carriage, andtheir milled heads are accessible through openings, as shown, made inthe plates which form the carriage, so that they can be readilymanipulated by the finger and thumb to regulate the vertical position ofthe saw within the carriage.

They pass through lOO by gravity, engaging with the teeth h 72 h aresome of the screws which hold' together the two parts of the carriage.

71 h are bolts which are attached to the table 77, of the machine, uponwhich the sawcarriage rests. These bolts pass downwardly through thesolid immovable frame of the machine, as shown, and have heads h ontheir ends.

71 h are springs which encircle the bolts b and abut at one end againstthe frame of the machine and at the other of the bolts.

it represents screw-bolts which are threaded into the frame of themachine, as shown,

J and rest at their upper ends against the under side of the table 77,By these means, in a manner well known, the table 72. carrying thesawcarriage upon it, can be adjusted vertically with great exactness togive more or less set to the teeth of the'saw, as may be desired. Thesprings k acting through the bolts h tend to pull the table 72,downwardly, and the threaded bolts 71 afford means for determining theelevation of the table.

The feeding mechanism consists of a forkshaped piece 1', which engageswith an eccentricj upon the main shaft A, and to the forked piece 1. isconnected by suitable adjusting devices k a rod m, which is pivoted to alever n, to the other end of which is pivoted a feeding-pawl 0, which inthe present instance acts g on the carriage which holds the saw.

19 is a retracting-spring for the forked piece '5 and coacting parts,whereby it is normally held in engagement with the eccentricj, and alsoafter each forward impulse the feedingpawl o is returned to primaryposition by reason of the rocking of the lever 72., occasioned by thespring 19.

In Fig. 5 I show a detail of the construction of the racks I. Thisfigure is taken on the line x a: in Fig. 2 looking in the direction ofthe arrow. The edges of the racks are shown as dovetailed, each slidingin a correspondingly shaped slideway made between the parts (1 q of themain frame and a stay-piece 1', attached to the frame q by bolts 8 orequivalent device.

The operation of the apparatus is as follows: The saw in its carriage isintroduced at the front end of the machinethat is to say, at theright-hand side, as shown in Fig. 2. The carriage, with the saw-bladeproperly adjusted upon it, is p shed into the machine through theslideway provided for it (shown in Fig. 3) until the blade reaches thepoint where the setting operation may be performed upon it. It issometimes desirable to lift the feedingpawl o by hand during theintroduction of the carriage, so that it may be pushed in until thesaw-blade reaches the plungers, thus saving time. When this point hasbeen reached, the pawl is allowed to engage with the teeth of thecarriage and the machine is started. At each revolution of the mainshaft the feeding device propels the carriage a distance against theheads equal to two teeth. Suitable devices are provided for theadjustment of the feeding mechanism, so that the machine will be adaptedto set saws having teeth of different sizes. At each revolution of themain shaft and concurrently with the feeding operation the cams F Fvertically reciprocate the racks I I, which in turn rotate the pinions JJ, whereby the pawls M M move to the right and left, as indicated by thearrows in Fig. 3, swinging outwardly the two hammers P P, therebyputting the springs U under tension. The pawls carry the hammersout-wardly until the pins 0 0 engage with the inclined surfaces S S ofthe respective tripping-plates R R, whereupon the pawls are tripped andthe hammers Preleased and thrown by the springs U U, each delivering ablow upon the head of its plunger V V, respectively. The forward ends ofthe plungers are driven inwardly, each engaging with the appropriatetooth on the saw, setting it against the anvil, (which is immediatelybehind it,) and thereupon the springs Y Y return the plungers to normalposition. By the continued rotation of the main shaft the eccentricsbring back the pawls M and arms L to primary position ready for anotheroperation.

The above-stated operation of the parts is repeated with great rapidity,and the work performed is of a remarkably accurate and satisfactorycharacter.

It will be obvious to those who are familiar with this art that manymodifications may be made in the details of construction of the partswithout departing from the essentials of the invention. I therefore donot limit myself to such details.

I claim- 1. In a saw-setting machine the combination of a movablecarriage within which the saw is clamped, intermittently-acting feedingdevices which engage with the carriage, a pair of independently-actingand spring-actuated hammers,which operate in reverse directions,plungers adapted to be engaged by the hammers, and anvils to resist thethrust of the plungers, for the purposes set forth.

2. In a saw-setting machine the combination of a movable carriage withinwhich the saw is clamped, intermittently-acting feeding devices whichengage with the carriage, two independently acting and spring actuatedhammers, one presented to the right and the other to the left, right andleft plungers adapted to be engaged by the hammers, and right and leftanvils adapted to resist the thrust of the plungers, the faces of theanvils being beveled opposite the teeth to set the teeth to the rightand left respectively, for the purposes set forth.

3. In a saw-setting machine the combination of a movable saw-clam pingcarriage, means to adjust the saw within the carriage,intermittently-acting feeding devices for the carriage, a pair ofindependently-acting and spring-actuated hammers, the parts being soarranged that the feeding is effected during the time the springs of thehammers are put under tension, and the hammers act during the time thefeeding devices are recovering; plungers each provided with a retractedspring adapted to be engaged by the hammers, and anvils to resist thethrust of the plungers, for the purposes set forth.

4. In a saw-setting machine the combination of a carriage for thesupport of the saw, feeding devices adapted to engage with the carriage,reciprocating racks which engage respectively with pinions, oscillatinghammers, means whereby the hammers are actuated by the racks andpinions, springs put under tension by the movement of the hammersrespectively, plungers which receive the stroke of the hammers, andsprings for the for the purposes set forth.

6. In a saw-setting machine the combination of a shaft, cams mountedupon the shaft, racks connected with said cams, pinions which engagesaid racks, pawls carried by the pinions, oscillating hammers engaged bythe pawls, means to trip the pawls, springs put under tension by themovement of the hammers, plungers to receive the stroke of the hammers,and anvils to resist the thrust of the plungers, for the purposes setforth.

7. A movable carriage for supporting a sawblade composed of two plates,separate from other parts of the machine and adapted to clamp the bladebetween them, means such as screws carried by the plates, whereby theymay be clamped together and adjustable devices located between theplates for determining the vertical position of the saw-blade betweenthe two parts of the carriage, for the purposes setforth.

8. A carriage for supporting a saw-blade composed of two plates adaptedto clamp the blade between them, adjustable devices located between theplates for determining the vertical position of the saw-blade within thecarriage, and detents or teeth on one of said plates whereby thecarriage and the saw-blade may be fed through the machine, for thepurposes set forth.

9. The combination of a table or plate upon which the saw-carryingdevice rests, said table being not shorter than the saw-blade, adjusting-screws threaded into the frame of the machine whereby therespective ends of the table maybe vertically and independentlyadjusted, and springs connected with the said table which normally pullthe same downwardly, for the purposes set forth.

10. The combination of a table or plate 11 pon which the saw-carryingdevice rests, said table being not shorter than the saw-blade,adjusting-screws threaded into the frame of the machine whereby therespective ends of the table may be verticallyadjusted,downwardlyextending headed bolts connected with the table, andsprings encircling the bolts, engaging with the heads thereof at one endand against some immovable part of the machine at the other end, for thepurposes set forth.

Signed at New York, in the county of New York and State of New York,this 30th day of October, A. D. .1899.

AUGUSTUS G. SAXTON.

Witnesses:

PHILLIPS ABBOTT, EDGAR R. MEAD.

